Could you tell me what hardware is in fenix 6x pro solar?
you can enter in service mode and you will see this information
Could you also confirm if works wifi with 5g in standard AC?
Could you tell me what hardware is in fenix 6x pro solar?
you can enter in service mode and you will see this information
Could you also confirm if works wifi with 5g in standard AC?
I don't know but I'll show you if you buy me one. 
Fenix 5X has one Freescale Kinetis 61 CPU that can run at max. 120 MHz and a Maxim 32620 Cortex M4 CPU that can run max. at 96 MHz or 4 MHz in low power. These are max. supported frequencies and probably run at lower to save power. It had 32 MB Winbond DDR RAM, 16 GB Toshiba flash memory and Atmel Atwilc WiFi chip. GPS chip was MTK 3333AV. I don't know about components of any newer watches.
Newer watches has Sony CXD5603GF GPS chips instead of old MTK. Many other components might have changed but I won't be surprised if not all changed as Freescale CPU on the Fenix 5X is the same CPU on years older Garmin Epix. But I'm sure many things have changed. CPUs are maybe NXP as Freescale is bought by NXP and it sponsored some Garmin eventsor something else not related to past.